India’s push to accommodate a booming urban population and attract investment rests in large part with dozens of “smart” cities like the one being built on the dusty banks of the Sabarmati river in western India.

So far, the city boasts modern underground infrastructure, two office blocks and not much else.

The plan, however, is for a meticulously planned metropolis complete with gleaming towers, drinking water on tap, automated waste collection and a dedicated power supply – luxuries to many Indians.

With an urban population set to rise by more than 400 million people to 814 million by 2050, India faces the kind of mass urbanization only seen before in China, and many of its biggest cities are already bursting at the seams.

Ahead of his election last May, Prime Minister Narendra Modi promised 100 so-called smart cities by 2022 to help meet the rush.

At a cost of about US$1 trillion (HK$7.75 trillion), according to estimates from financial consultants KPMG, the plan is also crucial to Modi’s ambition of attracting investment while providing jobs for the million or more Indians who join the workforce every month.

His grand scheme, still a nebulous concept involving quality communications and infrastructure, is beginning to take shape outside Gandhinagar, capital of the state of Gujarat, with the first “smart” city the government hopes will provide a model for India’s urban future.

“Most [Indian] cities have not been planned in an integrated way,” said Jagan Shah, director of the National Institute of Urban Affairs which is helping the government set guidelines for the new developments.

Among the challenges to getting new cities built or existing cities transformed is the lack of experts who can make such huge projects work, and attracting private finance.

“To get the private sector in, there is a lot of risk mitigation that needs to happen because nobody wants a risky proposition,” he said, stressing the need for detailed planning.

To build smart cities, India allocated 60 billion rupees (HK$5.4 trillion) in its annual federal budget, even as it spent just a fraction of last year’s allocation of 70.6 billion rupees, said Shah.

Gujarat International Finance Tec-City (Gift), as the smart city is called, will double as a financial hub, with tax and other breaks to lure banks, brokerages and other businesses. Developed in partnership with IL&FS Engineering and Construction, it aims to compete with India’s financial capital of Mumbai as well as overseas rivals like Dubai and Singapore.

Pressure on India’s existing urban centres is already intense, with cities like Mumbai gridlocked by traffic and hampered by poor infrastructure and a lack of amenities like parks and effective public transport.

Yet some experts believe that building new cities may not be the answer to India’s swelling urban population.

He added that new cities would be only a small part of the solution relative to brownfield projects.

A bird’s eye view from the top one of the two office buildings on the 886-acre Gift site, a venture which began when Modi was chief minister of Gujarat, shows little sign yet of the 9 billion rupees spent on the first phase. But the sandy plain hides infrastructure including an underground tunnel for utilities, a first in India. The key, experts say, is time.